Device for bringing the stock stream upon the screen of a paper making machine



June 1l, 1940. V w.,1-HAL.ER 2,203,302 DEVICE FOR BRINGING THE STOCKSTREAM UPON THE `SCREEN 0F A PAPER MAKING MACHINE I Filed March 1o,193s` `Fig. 7

Patented June 11, 1940 DEVICE FOR BRINGING THE STOCK STREAM- UPON THESCREEN OF A PAPER MAKING MACHINE wilhelm Thaler,Heidenheim-on-the-Brenz, Germany, assignor to American Voith Contact Co.Inc., New York, N. Y., a corporation of New York Application Marchlll,1938, Serial No. 195,035

. In Germany January 25, 1937 1 Claim.

` This invention relates to devices for bringing the stock stream uponthe screen of a paper making machine. 1

` The object of the invention is to provide means specially adapted tosolve the problems attendant highspeed stock impingement upon thescreen.

The object is further to provide means enabling the stock stream to bevaried in direction and in `respect to the screen, and also to vary thepoint of impact of the stream upon the screen, in a manner to assuresmoothness and quietness of the stream.

The object is further to provide simple means to vary the `positions ofthe lips ofthe stock stream nozzles, the essential being that howeverthe lips vary in respect to each other, the lower lip is within theupper lip.

With these objects in View, the invention in its simplest conceptconsists in having the upper portion of a stock inlet nozzlesubstantially horizontal or parallel with the upper surface of thescreen of a Fourdrinier paper making machine, and the lower portioninclined in respect thereto, with the upper free discharge end at alltimes extending beyond the lower.free discharge end, and the dischargeopening of the nozzle placed approximately at the part of the frontbreast roll.

The invention consists further of combinations therewith, of means foradjustment, and, lastly,

of a double nozzle, the outer walls of which are adjustable. I l l Theinvention further consists of certain features hereinafter to bedescribed. The invention will be shown in the drawing in the forms ofembodiments, and will be finally pointed out in the claim.

In the accompanying ,drawing- Figure 1 is a vertical section of the forepart of a screen, the front breast roll, and the improved nozzle appliedthereto.

Figure 2 is a similar section with the same known parts, but withanother embodiment of the novel nozzle applied thereto.

Similar characters of reference indicate corresponding parts throughoutthe various views.

Referring to the drawing, and more particularly to Figures 1 and 2, thescreen breast roll 8, and part of the Fourdrinier screen 9 is thereshown. l

In Figure l, the stock supply channel 'l guides and feeds the stock to anozzle IU. In Figure 2, the stock also enters the nozzle I I, in thisembodiment, from a stock inlet box I2. The nozzle II is formed of asubstantially horizontal wall I3 and of a Wall I4 inclined thereto, theend of the `into, relatively permanent position.

wall I3 extending beyond the end of the wall In this embodiment, thesewalls I3 and I4 are xed or stationary and are arranged in therelationship shown in Figure 2. Adjustments of the nozzle `II may bemade. For this purpose a movable extension plate I5, which is alsosubstantially horizontal or parallel with the horizontal portion of thescreen 9, is supported by an adjusting device secured to the housing ofthe stock inlet box I2 at I6. The plate I5 has 4a bent-up portion I1provided with an opening to permit the passage of a .screwthreaded boltI8 secured at I6 to the box I2. At either side of the bent-up portionI1, screwthreaded nuts I9 and 20 are arranged. The proper rotation ofthe nuts I9 and 20 on the bolt I8, with the corresponding movement ofthe plate I5, enables the plate I5 to be moved horizontally, and thenxed The plate I5 slides upon the upper plate I3 of the nozzle II, andis, of course, in watertight connection therewith. By such adjustmentmeans, not new per se, or by other suitable means, the `plate I5regulating the outflow of the upper portion of the nozzle II, may behorizontally moved to and fro, and, asstated, placed into a relativelypermanent position. v

The lower plate or portion of the nozzle II is formed by the upwardlyinclined member I4. which, as before stated, terminates inwardly of theend of the plate or portion I3. To the exterior of the portion I4, thereis provided an adjustment means, similar in operation to the `one justdescribed. Tothe plate I4 is secured an upright plate 20, through whicha bolt 2l 22a. The bolt 2I is screwthreaded and is engaged by tworotatable nuts 23 and 23a, between which a bent portion 24 of the plate25 is held, the bent portion 24 being provided with an opening for thepassage of the bolt 2l. The free end of the plate 25 is below and withinthe free end of the plate I5. By the adjustment described, the plate 25may be moved to and fro, but always within the limitation imposed,namely, to stay within the plate 25, as described. As the adjustmentmeans per se are not novel, other suitable means well known may be used.By the adjustment shown in Figure 2, the stock iiow 30 is given a curvedpassage at 3|, as shown in Figl ure 2.

The stock box I2 may also be raised or lowered by suitable means, or thebreast roll 8 may be raised or lowered. By these various adjustments,

a variation in the direction of flow of the stock upon the screen, asalso a Variation in the position of impingement. of the stock flow uponthe screen, can be had, and the desirable ones selected. y

In Figure l, the invention is shown in a; simpler embodiment. Here, aspecial form of stock ow channel I guides the stock along curved surface33 substantially concentric with the curved surface 34, the curvedsurface 3,3 merging into a straight nozzle wall surface Ma, the free endof which terminates over the top but laterally of the same, of thebreast roll 8. The curyed surface 34 is fixed 0r stationary, relatively,and in cooperation therewith there is provided a plate I5a arrangedsubstantially horizontal and parallel with the upper surface of thescreen 9. This plate 15a has a downwardly bent portion 35, having anopening or space to enable the bolt 36 to pass therethrough. This boltis fixed to a supporting member 31. Two rotatable nuts 38 and 38a' aremovable uponthis bolt 36, and as moved determinesthe position of theplate |5a Again the 'adjustment means may befvaried, asthey are not newperse, and such variation is within the knowledge ofthe mechanic. Novel,however, is the relationship ofthe positions of the ends of the nozzleI0, in that whatever'adjustment may be carried out from one rnoz'zleportion to the other, or both in respect to each other, the upper plateor portion I5a is always Abeyond the lower plate or portion, as shown,for instance, in `Figure l, the free end of the upper plate or portionbeing approximately near the top of the breast roll, and in certainpositions in substantial alignment with the vertical plane passingthrough th'eaxis of the front breast-roll.

,'Again, other fiexibilities may be provided, as, for

example, if the channel 1 be made of a flexible tubing, vertical lateralor inclined adjustments can be carried out in addition to the adjustment:essential .to the invention, that'the lower portion `of the nozzle bealways within the upper portion,

ssgor. that the upper. portion always extend beyond the lower portion,in whatever position the respective portions may be. By this dispositionof parts, the stock passes over the curvature Vof the breast roll due tothe pressure of the stock, under v a definite desired angle ofimpingement upon the upper screen of the paper making machine. Alfurther advantage is that the invention lends itself especially to theutilization of higher working velocities machines, and that the stockflows with greater velocities upon the screen, the

stream jbeingr at the same time smoothed and quietedi It has been seenthat by means of the invention, theembodiments of which have been shown,the direction of the stock stream in respect to the screen, as also theposition at which the stock stream strikes the screen, may be varied, byextremely simple means.

By the devices described it is possible to give the stock stream freelyemerging from the nozzle various directions and to guide it so that itimpnges or strikes the screen at different positions, beginning withapproximately the top of the breast roll; also, the angle can beinfluenced, under which the impingement of the stock 4s'tream upon thebreast roll may take place. `All these positions of the stock stream aredependent upon the positioning of the upper portion or upperlip of thenozzle, in respect to the lower portion or lowerlip, the upper lip beingparallel or approximately parallel with the screen, and movablesubstantially horizontally to and fro in respect thereto, and the underportion or underlip of the nozzle being positioned inclined in respectto the upper, and always within the upper. This projection of the upperlip portion has the further advantage that the stock stream moving athigher velocities Y upon the screen is smoothed and quieted. Y

It is obvious that various changes and modifications may be made indetails of construction and the method of use of the above describedembodiment of my invention without departing from the spirit thereof,such changes and modifications being restricted only by the scope of thefollowing claim.

I claim:

In a nozzle device for a stock receiving container for bringing thestock stream upon the top of a horizontal screen passing over the breastroll of a paper making machine, in which the lip members of theV nozzleare inclined to each other and in which the tip of the upper lip memberextends beyond the tip of the lower lip member, the tips of both lipmembers being at the topof the breast roll, the combination of ahorizontal upper lip member disposed parallel with the screen, anadjustable horizontal plate movabe upon the upper lip member to and froin a horizontal direction, and an adjustable plate movable upon thelower lip member parallel to the plane of the lower lip member, the tipof the plate on the lower lip member being at all times at a distanceinwardly of the tip of the upper horizontal member plate.

WILHELM THALER.

